Data / Nonprofits / Colorado / Denver / Animal-related
Animal-related nonprofits in Denver, CO: 85 registered with the IRS
85 animal-related nonprofits are registered with the IRS in Denver, CO, 83 of them 501(c)(3) charities; the 33 that report revenue took in $197.6 million. The largest by revenue: Denver Dumb Friends League ($92.9 million), Denver Zoological Foundation Inc ($66 million), Morris Animal Foundation ($17.3 million).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Denver Dumb Friends League | 501(c)(3) | 1942 | $92.9 million | $180.3 million | 2025-06 |
| Denver Zoological Foundation Inc | 501(c)(3) | 1952 | $66 million | $26.3 million | 2025-12 |
| Morris Animal Foundation | 501(c)(3) | 1956 | $17.3 million | $123.3 million | 2025-06 |
| True Companions Inc | 501(c)(3) | 1990 | $11.3 million | $15 million | 2025-12 |
| Colorado Zoological Trust Inc | 501(c)(3) | 1999 | $2.9 million | $38.1 million | 2025-12 |
| Trout Unlimited | 501(c)(3) | 1972 | $1.4 million | $1.6 million | 2025-03 |
| Rocky Mountain Feline Rescue Inc | 501(c)(3) | 1982 | $767,458 | $457,403 | 2025-12 |
| Africa Network for Animal Welfare- USA | 501(c)(3) | 2008 | $630,520 | $308,604 | 2024-12 |
| Bergen Spay and Neuter Alliance | 501(c)(3) | 2019 | $504,375 | $449,678 | 2025-12 |
| Action for A Wild Earth | 501(c)(3) | 2024 | $501,159 | $429,460 | 2024-12 |
| Golden Retriever Freedom Rescue Inc | 501(c)(3) | 2003 | $391,736 | $430,642 | 2024-12 |
| A Friend of Jack Rescue | 501(c)(3) | 2020 | $375,848 | $42,280 | 2024-12 |
| Pawsco | 501(c)(3) | 2004 | $337,897 | $339,846 | 2025-12 |
| Colorado Federation of Animal Welfare Agencies | 501(c)(3) | 2002 | $233,398 | $481,398 | 2025-12 |
| Colorado Voters for Animals | 501(c)(4) | 2000 | $222,772 | $182,641 | 2025-12 |
| Pax Fauna | 501(c)(3) | 2020 | $217,386 | $12,917 | 2024-12 |
| Animal Dominion Rescue | 501(c)(3) | 2022 | $217,170 | $21,009 | 2024-12 |
| Denver Cat Rescue | 501(c)(3) | 2020 | $181,709 | $94,460 | 2024-12 |
| Ferret Dreams Rescue & Adoption | 501(c)(3) | 2009 | $176,497 | $93,771 | 2024-12 |
| No Kill Colorado | 501(c)(3) | 2014 | $148,113 | $185,330 | 2025-12 |
| Pets of Aguirre Welfare Shelter Inc | 501(c)(3) | 2011 | $124,281 | $301,269 | 2025-12 |
| Colorado St Bernard Rescue Inc | 501(c)(3) | 2006 | $122,036 | $7,498 | 2025-12 |
| Red Fern Animal Rescue | 501(c)(3) | 2019 | $114,698 | $5,586 | 2024-12 |
| Life Is Better Rescue | 501(c)(3) | 2011 | $107,915 | $292,019 | 2024-12 |
| Front Range German Shepherd Rescue Inc | 501(c)(3) | 2024 | $92,533 | $371,329 | 2024-12 |
| Veterans Puppy for Life Organization | 501(c)(3) | 2016 | $73,608 | $17,203 | 2025-12 |
| Paws and Claws Puerto Vallarta | 501(c)(3) | 2023 | $66,943 | $26,608 | 2025-12 |
| Denver Samoyed Association Inc | 501(c)(4) | 2004 | $41,957 | $55,040 | 2025-12 |
| Peace Love & Paws | 501(c)(3) | 2016 | $26,635 | $20,199 | 2025-12 |
| Hope Through Horses Inc | 501(c)(3) | 2018 | $15,957 | $57,036 | 2025-12 |
| Docs On the Blocks | 501(c)(3) | 2004 | $13,896 | $10 | 2025-12 |
| Daisy Chain LTD | 501(c)(3) | 2017 | $9,955 | $4,568 | 2025-12 |
| Forever Loving Homes | 501(c)(3) | 2022 | $1,959 | $448 | 2025-12 |
| American Association of Zoo Keepers | 501(c)(3) | 1992 | $0 | $0 | 2025-12 |
| Baco Fund | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Barnwater Cats Rescue Organization | 501(c)(3) | 1998 | $0 | $0 | 2025-09 |
| Bitcoin for Bullies Inc | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Blake S Haven Inc | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Born for More | 501(c)(3) | 2024 | |||
| Care for Canines | 501(c)(3) | 2026 | |||
| Caylebs Kindred Senior Dog Rescue | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Cheetah Defenders Alliance Inc | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Colorado Animal Protectors | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Colorado Bird at Las Partnership | 501(c)(3) | 1987 | $0 | $0 | 2025-12 |
| Colorado Citizens for Canine Welfare | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Colorado Herding Dog Rescue | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Colorado Senior Dog Rescue and Hospice | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Cuale Spay and Neuter Clinics | 501(c)(3) | 2026 | |||
| Dog Yard Share | 501(c)(3) | 2026 | |||
| Feathers & Friends Rescue & Refuge Inc | 501(c)(3) | 2003 | $8,674 | 2025-12 | |
| Friends of Denver Animal Shelter | 501(c)(3) | 2026 | |||
| Fursos | 501(c)(3) | 2026 | |||
| Holy Land Cats | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Horse Matters Rescue Inc | 501(c)(3) | 2025 | |||
| Human Animal Bond Association | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Humane Matters Collective | 501(c)(3) | 2026 | |||
| Humane Society of Boulder Valley Trust | 501(c)(3) | 1999 | $1.6 million | 2025-12 | |
| Jailbreak Husky Rescue | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| K9 Global Rescue | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Malcolm To the Rescue | 501(c)(3) | 2022 | $28,365 | 2024-12 | |
| Mile High Dachshunds Rescue Inc | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Moving Mountains Animal Rescue | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| National Canine Advocacy Group | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Ngspa Prairie Chicken Championship Inc | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Options for Animals Corporation | 501(c)(3) | 2014 | $0 | $0 | 2023-12 |
| Paddles for Paws | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Passion-Ate Paws Inc | 501(c)(3) | 2024 | |||
| Pawsitive Impact | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Pets Rule Care Project | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Protego Foundation | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Pug 911 | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Rafiki Fund | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Red Rocks Kitten Rescue | 501(c)(3) | 2024 | |||
| Rocky Mountain Dancin Dogs Inc | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Second Watch K9 | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Spaycations With Friends | 501(c)(3) | 2026 | |||
| Stray and Orphaned Animal Rescue | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Symbiosis Wildlife Institute | 501(c)(3) | 2026 | |||
| Teefs Foundation | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Tinkers Dream Inc | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Wagapalooza | 501(c)(3) | 2023 | $926 | 2024-12 | |
| Wags for A Cure | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| We Matter 2 Pet Rescue | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Wildlife Generation Inc | 501(c)(3) | 2023 | $0 | $6,919 | 2024-12 |
| Wolf Heart Rescue | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
Other causes in Denver, CO
- Education 604
- Human services 464
- Philanthropy, voluntarism and grantmaking foundations 434
- Religion-related 422
- Arts, culture and humanities 408
- Community improvement and capacity building 323
- Recreation and sports 260
- Housing and shelter 185
- Health care 154
- Youth development 138
- Mental health and crisis intervention 136
- Public and societal benefit 116
- Environment 116
- International, foreign affairs and national security 94
- Civil rights, social action and advocacy 80
- Crime and legal-related 77
- Employment 63
- Food, agriculture and nutrition 56
- Diseases, disorders and medical disciplines 48
- Public safety, disaster preparedness and relief 31
- Mutual and membership benefit 25
- Science and technology 25
- Medical research 23
- Social science 7
Every nonprofit in Denver, CO · Animal-related nonprofits across the state · Nonprofits in every city of the state
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.